vRO and UM patching a vCluster

[zenivox]

Hello, unfortunately I don't avail of a test environment as yet and I'm a little worried about launching vRO WF to patch an entire vCluster through UM. In the UM gui there is the possibility to tell the app to update x number of ESXi hosts at one time or let the app decide. How does it work in the vRO WF. I see the "Remediation asynchronously" which is probably the best choice, but what is the criteria it adopts when selecting hosts and set them in maintenance mode? Is it one by one or ?

[daphnissov]

The workflow provided by the vRO plug-in does exactly the same thing as what you'd do manually. You can either choose to remediate individual hosts, or the entire cluster. If you remediate the entire cluster, VMs are migrated to other hosts to ensure accessibility.

I actually tested this in a lab environment I have to verify, and it works exactly the same way.

Meanwhile the task waits until the cluster remediation completes.

The cluster is fully updated and the workflow token completes the run successfully when the vCenter task completes.

[zenivox]

Hi Daphnissov, and thanks again for your time,

apologies as I was not clear in my initial post, what I meant exactly it has to do with the possibility of parallel remediation. In my experience if I let UM decide how many hosts to update in one go it is too aggressive and it works on too many hosts at once. Ok for some vClusters but for those vClusters where I have hosted critical and intensive applications it is too intensive and it can cause some disruption. For those I need to tell UM work only on X number of hosts at once. I admit that we are also a bit short of hardware resources at present. So I don't see in vRO this option and I was wondering if that is correct or if not how to achieve it. If possible.

[daphnissov · Accepted solution]

When you remediate a cluster, the workflow calls the remediation task using the default options you've set. So if you want to restrict it to a single host at a time, save that option as default. Parallel migration is off by default, so if you've never enabled that and changed the default, then that's what it'll adopt.

[daphnissov]

And if you want to change that, go edit settings within VUM and go to Manage -> Settings -> Host/Cluster Settings.

[zenivox]

Many thanks indeed!